redux combineReducers 的使用和注意方式

学习代码的时候,一定要动手实践,否则根本学不会!


import { createStore, applyMiddleware } from "redux";
import { combineReducers } from "redux"
//引入中间键盘
import logger from "redux-logger"
import thunk from "redux-thunk"

// 两个reducer 我开始测试 combineReducer
function nameReducer(state = { "name": "action" }, action) {
    const type = action.type;
    switch (type) {
        case "get":
            return state;
        default:
            return state;
    }
}
function CountReducer(state = 10, action) {
    const type = action.type;
    switch (type) {
        case "add":
            state++;
            return state;
        case "minus":
            state--;
            return state;
        case "asyncAdd":
            // 我打印这个就是想看下,它咋接收参数的!
            console.log(action);
            state++;
            return state;
        default:
            return state;
    }
}


// applyMiddleware 使用中间键
const store = createStore(combineReducers({
    count: CountReducer,
    name: nameReducer
}), applyMiddleware(logger, thunk));
export default store;

上面就是combineReducers 的使用方式,我要重点说的是下面的使用方式

显示效果

总结下,说白了,就是映射属性时,必须带key ,key 用来区分不同的reducer

好,属性我们会了,我们再测试下方法

方法和原来一样

行,到此我们redux 就基本学会了,会用redux react-redux react-thunk 包括combineReducers 的使用

好,就到这里,祝大家学习愉快,生活幸福

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转载自blog.csdn.net/qq_15009739/article/details/107295643